<!DOCTYPE html>
<html>
<!-- Created by GNU Texinfo 7.1.1, https://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!-- This file documents the use of the GNU compilers.

Copyright © 1988-2023 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "Funding Free Software", the Front-Cover
Texts being (a) (see below), and with the Back-Cover Texts being (b)
(see below).  A copy of the license is included in the section entitled
"GNU Free Documentation License".

(a) The FSF's Front-Cover Text is:

A GNU Manual

(b) The FSF's Back-Cover Text is:

You have freedom to copy and modify this GNU Manual, like GNU
     software.  Copies published by the Free Software Foundation raise
     funds for GNU development. -->
<title>H8/300 Variable Attributes (Using the GNU Compiler Collection (GCC))</title>

<meta name="description" content="H8/300 Variable Attributes (Using the GNU Compiler Collection (GCC))">
<meta name="keywords" content="H8/300 Variable Attributes (Using the GNU Compiler Collection (GCC))">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta name="viewport" content="width=device-width,initial-scale=1">

<link href="index.html" rel="start" title="Top">
<link href="Indices.html" rel="index" title="Indices">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Variable-Attributes.html" rel="up" title="Variable Attributes">
<link href="IA_002d64-Variable-Attributes.html" rel="next" title="IA-64 Variable Attributes">
<link href="Blackfin-Variable-Attributes.html" rel="prev" title="Blackfin Variable Attributes">
<style type="text/css">
<!--
a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
kbd.key {font-style: normal}
span:hover a.copiable-link {visibility: visible}
-->
</style>


</head>

<body lang="en_US">
<div class="subsection-level-extent" id="H8_002f300-Variable-Attributes">
<div class="nav-panel">
<p>
Next: <a href="IA_002d64-Variable-Attributes.html" accesskey="n" rel="next">IA-64 Variable Attributes</a>, Previous: <a href="Blackfin-Variable-Attributes.html" accesskey="p" rel="prev">Blackfin Variable Attributes</a>, Up: <a href="Variable-Attributes.html" accesskey="u" rel="up">Specifying Attributes of Variables</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<h4 class="subsection" id="H8_002f300-Variable-Attributes-1"><span>6.34.5 H8/300 Variable Attributes<a class="copiable-link" href="#H8_002f300-Variable-Attributes-1"> &para;</a></span></h4>

<p>These variable attributes are available for H8/300 targets:
</p>
<dl class="table">
<dt><a class="index-entry-id" id="index-eight_002dbit-data-on-the-H8_002f300_002c-H8_002f300H_002c-and-H8S"></a>
<a id="index-eightbit_005fdata-variable-attribute_002c-H8_002f300"></a><span><code class="code">eightbit_data</code><a class="copiable-link" href="#index-eightbit_005fdata-variable-attribute_002c-H8_002f300"> &para;</a></span></dt>
<dd><p>Use this attribute on the H8/300, H8/300H, and H8S to indicate that the specified
variable should be placed into the eight-bit data section.
The compiler generates more efficient code for certain operations
on data in the eight-bit data area.  Note the eight-bit data area is limited to
256 bytes of data.
</p>
<p>You must use GAS and GLD from GNU binutils version 2.7 or later for
this attribute to work correctly.
</p>
</dd>
<dt><a class="index-entry-id" id="index-tiny-data-section-on-the-H8_002f300H-and-H8S"></a>
<a id="index-tiny_005fdata-variable-attribute_002c-H8_002f300"></a><span><code class="code">tiny_data</code><a class="copiable-link" href="#index-tiny_005fdata-variable-attribute_002c-H8_002f300"> &para;</a></span></dt>
<dd><p>Use this attribute on the H8/300H and H8S to indicate that the specified
variable should be placed into the tiny data section.
The compiler generates more efficient code for loads and stores
on data in the tiny data section.  Note the tiny data area is limited to
slightly under 32KB of data.
</p>
</dd>
</dl>

</div>



</body>
</html>
